Berkshire Hathaway Inc.
PL ˙ WSE
1.702,00 PLN 0,00 (0,00%)
2026-05-07
DEL PRIS
SecurityPL:BRKB / Berkshire Hathaway Inc.
InstitutionFactory Mutual Insurance Co
Latest Disclosed Ownership237,000 shares
Latest Disclosed Value $ 113,570,400
Factory Mutual Insurance Co reports 2.55% increase in ownership of BRKB / Berkshire Hathaway Inc.

On May 5, 2026 - Factory Mutual Insurance Co filed a 13F-HR form disclosing ownership of 237,000 shares of Berkshire Hathaway Inc. (PL:BRKB) valued at $434,184,000 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 231,100 shares of Berkshire Hathaway Inc.. This represents a change in shares of 2.55% during the quarter. The current value of the position is $403,374,000 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-05 2026-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 237,000 5,900 2.55 113,570 -2.23 1.2777
2026-01-23 2025-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 231,100 -23,400 -9.19 116,162 -9.21 1.1776
2025-11-10 2025-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 254,500 0 0.00 127,947 3.49 1.2460
2025-08-07 2025-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 254,500 0 0.00 123,628 -8.79 1.3513
2025-04-17 2025-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 254,500 0 0.00 135,542 17.49 1.5724
2025-01-24 2024-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 254,500 0 0.00 115,360 -1.52 1.2474
2024-10-10 2024-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 254,500 -1,600 -0.62 117,136 12.44 1.2115
2024-07-23 2024-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 256,100 -1,500 -0.58 104,181 -3.83 1.1868
2024-04-12 2024-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 257,600 -3,300 -1.26 108,326 16.41 1.2443
2024-01-23 2023-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 260,900 0 0.00 93,053 1.82 1.1557
2023-11-07 2023-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 260,900 0 0.00 91,393 2.73 1.2749
2023-07-27 2023-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 260,900 0 0.00 88,967 10.44 1.3124
2023-05-08 2023-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 260,900 -5,100 -1.92 80,558 -1.96 1.2590
2023-02-02 2022-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 266,000 -72,000 -21.30 82,167 -8.96 1.2427
2022-11-04 2022-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 338,000 -3,000 -0.88 90,253 -3.06 1.4818
2022-08-08 2022-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 341,000 -4,200 -1.22 93,100 -23.58 1.5262
2022-05-13 2022-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 345,200 -25,500 -6.88 121,824 10.19 1.6474
2022-02-10 2021-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 370,700 -84,038 -18.48 110,554 -10.93 1.5961
2021-11-12 2021-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 454,738 -12,600 -2.70 124,117 -4.44 1.5502
2021-07-14 2021-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 467,338 -27,901 -5.63 129,882 2.66 1.5885
2021-05-10 2021-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 495,239 -15,161 -2.97 126,519 6.91 1.6186
2021-02-17 2020-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 510,400 -35,400 -6.49 118,346 1.83 1.5999
2020-10-19 2020-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 545,800 0 0.00 116,223 19.29 1.8810
2020-07-13 2020-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 545,800 -11,700 -2.10 97,430 -4.41 1.6708
2020-04-16 2020-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 557,500 -5,800 -1.03 101,928 -20.11 1.9357
2020-01-28 2019-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 563,300 -107,600 -16.04 127,588 -8.58 1.8813
2019-10-22 2019-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 670,900 100 0.01 139,561 -2.40 2.1576
2019-07-16 2019-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 670,800 4,200 0.63 142,994 4.53 1.7096
2019-04-09 2019-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 666,600 1,700 0.26 136,793 0.76 1.6153
2019-01-14 2018-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 664,900 0 0.00 135,759 -4.64 1.7419
2018-10-10 2018-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 664,900 13,400 2.06 142,362 17.07 1.4778
2018-07-19 2018-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 651,500 7,000 1.09 121,602 -5.42 1.3048
2018-04-05 2018-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 644,500 0 0.00 128,565 0.64 1.4080
2018-01-16 2017-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 644,500 0 0.00 127,753 8.13 1.3364
2017-10-11 2017-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 644,500 13,500 2.14 118,150 10.55 1.2953
2017-07-10 2017-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 631,000 0 0.00 106,873 1.61 1.2361
2017-04-21 2017-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 631,000 0 0.00 105,175 2.32 1.2457
2017-01-19 2016-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 631,000 0 0.00 102,789 12.76 1.2198
2016-10-26 2016-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 631,000 0 0.00 91,161 -0.22 1.1273
2016-07-12 2016-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 631,000 0 0.00 91,362 2.05 1.2036
2016-04-27 2016-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 631,000 14,000 2.27 89,526 9.89 1.1585
2016-01-14 2015-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 617,000 0 0.00 81,469 1.26 1.0959
2015-10-14 2015-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 617,000 0 0.00 80,457 -4.20 1.1006
2015-07-21 2015-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 617,000 0 0.00 83,980 -5.69 1.0969
2015-04-13 2015-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 617,000 -5,100 -0.82 89,045 -4.67 1.1732
2015-01-12 2014-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 622,100 10,000 1.63 93,408 10.47 1.2588
2014-11-04 2014-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 612,100 -2,900 -0.47 84,555 8.64 1.1694
2014-08-12 2014-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 615,000 0 0.00 77,834 1.27 1.0643
2014-05-15 2014-03-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 615,000 30,000 5.13 76,857 10.81 1.1126
2014-02-04 2013-12-31 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 585,000 40,000 7.34 69,358 12.12 1.0200
2013-10-16 2013-09-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 545,000 95,000 21.11 61,863 22.83 0.9811
2013-07-25 2013-06-30 13F BERKSHIRE HATHAWAY INC DEL CL B NEW 084670702 450,000 450,000 50,364 0.8254
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.